Keeps you dry.
As a cheaper and lighter water/windproof shell, it does exactly that, keeps you super dry. I also love how it packs down into it's own pocket and has a tightening cord around your head so it follows your head when you rotate it side to side. The only small problem so far is that the hood doesn't seem to reach quite far enough over my head and my forehead stays a little exposed. However it did keep the rest me 100% dry in a downpour. I'm 5"9', 165lbs and a medium fits perfect.